CN103377735B - A kind of reactor bottom in-pile component - Google Patents
A kind of reactor bottom in-pile component Download PDFInfo
- Publication number
- CN103377735B CN103377735B CN201210126989.1A CN201210126989A CN103377735B CN 103377735 B CN103377735 B CN 103377735B CN 201210126989 A CN201210126989 A CN 201210126989A CN 103377735 B CN103377735 B CN 103377735B
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- China
- Prior art keywords
- distribution
- reactor
- distribution ring
- pile component
- ring
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C5/00—Moderator or core structure; Selection of materials for use as moderator
- G21C5/02—Details
- G21C5/10—Means for supporting the complete structure
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The present invention relates to a kind of reactor bottom in-pile component, including reactor pressure vessel, be placed in the reactor core within reactor pressure vessel and be fixed on the reactor core support lower plate bottom reactor core；Also including the flow distribution device being provided with some circular holes, flow distribution device includes distribution ring and the circumferentially fixing middle distribution ring being connected bottom upper distribution ring, and circumferentially fixes the lower distribution plate being connected bottom middle distribution ring；Upper distribution ring top is provided with some protuberances turned up, and the protuberance that upper distribution ring is turned up is fixing with reactor core support lower plate to be connected.The circumferential side wall of upper distribution ring is provided with the isodiametric circular hole of continuous distribution.The circumferential side wall of middle distribution ring is provided with the circular hole of continuous distribution, and the quantity often arranging circular hole is equal, and diameter is identical.Rotational symmetric on lower distribution plate it is provided with circular hole.Present configuration is simple, and assignment of traffic is uniform, and resistance coefficient is little, it is simple to changes and keeps in repair.
Description
Technical field
The present invention relates to a kind of reactor bottom in-pile component, particularly relate to a kind of simple in construction, assignment of traffic is uniform, and resistance coefficient is little, it is simple to the reactor bottom in-pile component changed and keep in repair.
Background technology
Presurized water reactor comprises circuit cycle and includes primary Ioops and secondary circuit, and wherein primary Ioops completes the derivation of reactor heat, and is transmitted to the generating of secondary circuit pushing turbine by steam generator.Primary Ioops mainly responds core pressure vessel, in-pile component, fuel assembly, steam generator, main pump, and pipeline etc. forms.
Fuel assembly is placed in pressure vessel, in-pile component realize supporting functions, and nuclear fuel maintains controlled chain reaction of nuclear fission to produce energy in reactor.The energy that nuclear fission produces is absorbed by coolant, it is achieved the cooling to fuel assembly.Absorbing the coolant temperature after energy to raise, under the forced circulation effect of main pump, enter steam generator via main pipeline, with the exchange that secondary circuit carries out heat, the coolant after temperature reduces reenters reactor core.
In order to make fuel assembly be adequately cooled, coolant, before entering reactor core, needs to ensure its uniformity, so General reactions heap is all provided with flow distribution device.Traditional flow distribution device mostly is orifice-plate type structure, one or more layers orifice plate be formed by stacking by certain support.But cavity volume reduces instantly, the assignment of traffic effect of this structure becomes no longer preferable, replaces so needing to find new structure.
The form that the flow distribution device of Overseas New have employed ring, tube sheet combines, is matched formed by an assignment of traffic ring that machined a large amount of discharge orifice and one piece of vortex suppression.The assignment of traffic relative ideal of this structure, but owing to assignment of traffic ring is to be directly welded on pressure vessel so that must not change in the whole phase in longevity, risk is higher, and in addition, the resistance coefficient of structure itself is higher.
In order to overcome with present on technical disadvantages, need badly offer a kind of novel reactor bottom in-pile component.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of simple in construction, and assignment of traffic is uniform, and resistance coefficient is little, it is simple to the reactor bottom in-pile component changed and keep in repair.
For solving above-mentioned technical problem, one reactor bottom of the present invention in-pile component, including reactor pressure vessel, it is placed in the reactor core within reactor pressure vessel and is fixed on the reactor core support lower plate bottom reactor core；Also including the flow distribution device being provided with some circular holes, flow distribution device includes distribution ring and the circumferentially fixing middle distribution ring being connected bottom upper distribution ring, and circumferentially fixes the lower distribution plate being connected bottom middle distribution ring；Upper distribution ring top is provided with some protuberances turned up, and the protuberance that upper distribution ring is turned up is fixing with reactor core support lower plate to be connected.
The circumferential side wall of upper distribution ring is provided with the isodiametric circular hole of continuous distribution.
The circumferential side wall of middle distribution ring is provided with the circular hole of continuous distribution, and the quantity often arranging circular hole is equal, and diameter is identical.
Rotational symmetric on lower distribution plate it is provided with circular hole.
The axial height of upper distribution ring is less than the axial height of middle distribution ring.
The angle that the angle that upper distribution ring circumferential side wall and horizontal plane are formed is formed with horizontal plane more than middle distribution ring circumferential side wall.
The lower surface of lower distribution plate is provided with some energy absorbing devices, and energy absorbing device lower end is provided with anti-breaking base plate.
The bottom of the some protuberances that turns up of upper distribution ring is positioned at same level.
It is provided with some upper ends in flow distribution device to be connected with reactor core support lower plate, the support column that lower end is connected with lower distribution plate.
Can the uniformity coefficient of reactor core inlet flow rate distribution is related to reactor core heat be derived the most smoothly, directly determine the position of reactor core focus and the size of hot channel factor, and hot channel factor is directly connected to whole nuclear reactor or even the safety of whole nuclear power plant, have influence on the economy of core steam simultaneously.The present invention flow distribution device by a kind of clad type, coolant is after pressure vessel inlet adapter enters, pass through ring cavity, enter outside reactor lower chambers flow distribution device, realize turning to along lower head of pressure vessel arc surface, period enters in flow distribution device by the circular hole of flow distribution device, reactor core is entered after carrying out a certain degree of mixing in flow distribution device from the coolant of surrounding and bottom surface, owing to there being the connection of protuberance and support column, make whole flow distribution device have good rigidity, enough resist the side knock of coolant.
The present invention is by arranging the circular hole of suitable size, quantity, shape and position on flow distribution device, achieve good distribution effects before coolant enters reactor core, decrease friction loss, meet the indexs such as the inlet flow rate distribution deviation allowable value of adjacent assemblies, maximum average discharge.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of reactor bottom provided by the present invention in-pile component.
Fig. 2 be in the in-pile component of a kind of reactor bottom provided by the present invention the schematic diagram of flow distribution device.
In figure: 1 is reactor pressure vessel, 2 is reactor core support lower plate, and 3 is flow distribution device, and 4 is support column, and 5 is energy absorbing device, and 6 is anti-breaking base plate.
Detailed description of the invention
The present invention is further detailed explanation with embodiment below in conjunction with the accompanying drawings.
The present invention includes reactor pressure vessel 1, reactor core and flow distribution device 3.
Within reactor core is placed in reactor pressure vessel 1.The plectane of reactor core support lower plate 2 usually one piece of major diameter, plate is laid fuel assembly alignment pin, as supporting fuel assemblies.Substantial amounts of through hole, corresponding 4 of a usual group fuel assembly it is machined with in reactor core support lower plate 2.Coolant enters reactor core by these through holes, cools down reactor core.
Flow distribution device 3 includes distribution ring, middle distribution ring and lower distribution plate.The circumferential side wall of upper distribution ring is provided with the isodiametric circular hole of continuous distribution, and the crown circle diameter of upper distribution ring is more than lower curtate circle diameter.The circumferential side wall of middle distribution ring is provided with the circular hole of continuous distribution, and the quantity often arranging circular hole is equal, and diameter is identical, and the crown circle diameter of middle distribution ring is more than lower circumference diameter.The rotational symmetric circular hole that is provided with on lower distribution plate, the diameter of lower distribution plate is equal to middle distribution ring lower circumference diameter.The axial height of upper distribution ring is less than the axial height of middle distribution ring.The angle that the angle that upper distribution ring circumferential side wall and horizontal plane are formed is formed with horizontal plane more than middle distribution ring circumferential side wall.It is integral that upper distribution ring, middle distribution ring and lower distribution plate use welding manner to connect, and is avoiding processing discharge orifice, to prevent from slackening the intensity of weld seam at attachment weld.In the case of manufacturing technology allows, the processing method that solid forging can be used, the row of discharge orifice can be suitably increased now close to junction.Upper distribution ring top is provided with some protuberances turned up, and the protuberance that upper distribution ring is turned up is fixing by the way of bolt or welding with reactor core support lower plate to be connected.The bottom of the some protuberances that turns up of upper distribution ring is positioned at same level, and for bottom, in-pile component is deposited.It is provided with some upper ends in flow distribution device 3 to be connected by screw with reactor core support lower plate, the support column 4 that lower end and lower distribution plate are connected by screw.
The lower surface of lower distribution plate is uniformly fixed with four energy absorbing devices 5 by screw, and energy absorbing device 5 lower end is fixed with anti-breaking base plate 6 by screw.Energy absorbing device 4 is made up of sleeve, buffer and guide pillar.Anti-breaking base plate 5 has certain gap with reactor pressure vessel inwall.When there is reactor core fallen accident, anti-breaking base plate 5 contacts with reactor pressure vessel, and energy absorbing device 4 produces plastic deformation, and the energy that absorption part is fallen from reactor core, with the less impact to reactor pressure vessel.
Coolant enters reactor by the circular entrance sleeve of two to four on reactor pressure vessel 1, the lower chamber of reactor is entered down through circular passage, enter outside reactor lower chambers flow distribution device, realize turning to along reactor pressure vessel 1 low head arc surface, period enters in flow distribution device 3 by the circular hole of flow distribution device 3, reactor core is entered after carrying out a certain degree of mixing in flow distribution device 3 from the coolant of surrounding and bottom surface, owing to having protuberance and the connection of support column 4, whole flow distribution device is made to have good rigidity, enough resist the side knock of coolant.The circular hole of suitable size, quantity, shape and position is set on flow distribution device 3, achieve good distribution effects before coolant enters reactor core, decrease friction loss, meet the indexs such as the inlet flow rate distribution deviation allowable value of adjacent assemblies, maximum average discharge.
Claims (9)
1. a reactor bottom in-pile component, including reactor pressure vessel, it is placed in the reactor core within described reactor pressure vessel and is fixed on the reactor core support lower plate bottom described reactor core, it is characterized in that: also include being provided with the flow distribution device of some circular holes, described flow distribution device includes distribution ring and the circumferentially fixing middle distribution ring being connected bottom upper distribution ring, and circumferentially fixes the lower distribution plate being connected bottom middle distribution ring；Described upper distribution ring top is provided with some protuberances turned up, and the protuberance that described upper distribution ring is turned up is fixing with described reactor core support lower plate to be connected.
A kind of reactor bottom the most according to claim 1 in-pile component, it is characterised in that: the circumferential side wall of described upper distribution ring is provided with the isodiametric circular hole of continuous distribution.
A kind of reactor bottom the most according to claim 1 in-pile component, it is characterised in that: the circumferential side wall of described middle distribution ring is provided with the circular hole of continuous distribution, and the quantity often arranging circular hole is equal, and diameter is identical.
A kind of reactor bottom the most according to claim 1 in-pile component, it is characterised in that: rotational symmetric on described lower distribution plate it is provided with circular hole.
A kind of reactor bottom the most according to claim 1 in-pile component, it is characterised in that: the axial height of described upper distribution ring is less than the axial height of middle distribution ring.
A kind of reactor bottom the most according to claim 1 in-pile component, it is characterised in that: the angle that the angle that described upper distribution ring circumferential side wall and horizontal plane are formed is formed with horizontal plane more than described middle distribution ring circumferential side wall.
A kind of reactor bottom the most according to claim 1 in-pile component, it is characterised in that: the lower surface of described lower distribution plate is provided with some energy absorbing devices, and described energy absorbing device lower end is provided with anti-breaking base plate.
A kind of reactor bottom the most according to claim 1 in-pile component, it is characterised in that: the bottom of the some protuberances that turns up of described upper distribution ring is positioned at same level.
A kind of reactor bottom the most according to claim 1 in-pile component, it is characterised in that: it is provided with some upper ends in described flow distribution device and is connected with described reactor core support lower plate, the support column that lower end is connected with lower distribution plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210126989.1A CN103377735B (en) | 2012-04-27 | 2012-04-27 | A kind of reactor bottom in-pile component |
| PCT/CN2012/077178 WO2013159438A1 (en) | 2012-04-27 | 2012-06-19 | Reactor internals in lower reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210126989.1A CN103377735B (en) | 2012-04-27 | 2012-04-27 | A kind of reactor bottom in-pile component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103377735A CN103377735A (en) | 2013-10-30 |
| CN103377735B true CN103377735B (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210126989.1A Active CN103377735B (en) | 2012-04-27 | 2012-04-27 | A kind of reactor bottom in-pile component |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103377735B (en) |
| WO (1) | WO2013159438A1 (en) |
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| CN103177782B (en) * | 2013-01-08 | 2015-08-26 | 上海核工程研究设计院 | A kind of reactor bottom in-pile component |
| CN108711457B (en) * | 2013-12-31 | 2022-03-18 | 纽斯高动力有限责任公司 | Seismic attenuation system for nuclear reactor |
| CN103971763A (en) * | 2014-05-06 | 2014-08-06 | 中广核工程有限公司 | In-pile flow distribution device of reactor of nuclear power station |
| CN105719705A (en) * | 2014-12-01 | 2016-06-29 | 上海核工程研究设计院 | Outlet connection pipe in pressurized water reactor integral hydraulic simulation test |
| CN104637553A (en) * | 2015-01-28 | 2015-05-20 | 中科华核电技术研究院有限公司 | Flow distribution device and nuclear reactor component with same |
| CN105913889A (en) * | 2016-07-05 | 2016-08-31 | 上海核工程研究设计院 | Three-loop nuclear energy system |
| CN106847348B (en) * | 2017-01-19 | 2018-11-13 | 清华大学天津高端装备研究院 | A kind of ADS containment systems |
| CN107170490B (en) * | 2017-07-14 | 2023-07-04 | 中国核动力研究设计院 | Reactor lower chamber coolant mixing and flow equalizing device |
| CN107221368B (en) * | 2017-07-26 | 2023-07-04 | 中国核动力研究设计院 | Reactor coolant vortex suppression and flow distribution device and reactor internal component |
| FR3075448B1 (en) * | 2017-12-19 | 2020-01-03 | Electricite De France | NUCLEAR REACTOR FLOW TRANQUILIZATION ASSEMBLY |
| CN109036604B (en) * | 2018-07-20 | 2024-01-16 | 中广核研究院有限公司 | Reactor core filtering device |
| CN110931139B (en) * | 2019-12-06 | 2022-04-08 | 中国原子能科学研究院 | Flow equalization duct assembly for pool nuclear reactor |
| CN111681787B (en) * | 2020-06-23 | 2022-09-30 | 中国科学院上海应用物理研究所 | Lower cavity structure of reactor container and reactor container |
| CN112185600B (en) * | 2020-09-30 | 2022-02-01 | 中国核动力研究设计院 | Nuclear reactor lower cavity stepped flow distribution device and distribution structure |
| CN112185599B (en) * | 2020-09-30 | 2022-02-01 | 中国核动力研究设计院 | Nuclear reactor in-pile flow distribution device with cap-shaped drainage and flow guide plate |
| WO2023118920A1 (en) * | 2021-12-22 | 2023-06-29 | Framatome | Flow calming assembly for nuclear reactor, and associated reactor and method |
| CN114382829B (en) * | 2022-01-10 | 2023-07-04 | 中广核工程有限公司 | Instrument guide assembly compacting vibration reduction mechanism |
| CN114888734B (en) * | 2022-04-28 | 2023-05-12 | 中广核研究院有限公司 | Installation positioning device of lower internal pile member overhauling equipment |
| CN116313188A (en) * | 2022-09-09 | 2023-06-23 | 深圳中广核工程设计有限公司 | Reactor vortex suppression and flow distribution device |
| CN117275768A (en) * | 2023-09-01 | 2023-12-22 | 华能核能技术研究院有限公司 | Passive unloading shutdown device of pebble-bed reactor |
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2012
- 2012-04-27 CN CN201210126989.1A patent/CN103377735B/en active Active
- 2012-06-19 WO PCT/CN2012/077178 patent/WO2013159438A1/en active Application Filing
Patent Citations (4)
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| CN1080773A (en) * | 1992-06-24 | 1994-01-12 | 西屋电气公司 | Staged depressurization system |
| CN1253362A (en) * | 1998-11-11 | 2000-05-17 | 三菱重工业株式会社 | Internal structure of nuclear reactor installed with coolant flow stabilizing structural unit |
| CN1513089A (en) * | 2001-06-06 | 2004-07-14 | �����ɷ� | Pump for transporting heat exchange medium for multi-tube reactor |
| CN101606204A (en) * | 2007-02-12 | 2009-12-16 | 西屋电气有限责任公司 | Pressurized water reactor flow skirt apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013159438A1 (en) | 2013-10-31 |
| CN103377735A (en) | 2013-10-30 |
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Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: Shanghai Nuclear Engineering Research & Design Institute |
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Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |